Line fault diagnosis method and device based on heterogeneous model fusion

The invention discloses a line fault diagnosis method and device based on heterogeneous model fusion, and the method comprises the steps: obtaining a line fault traveling wave signal of a test sample, and carrying out the analysis of the fault traveling wave signal; respectively extracting a time domain feature, a frequency domain feature, a time frequency feature and a semantic feature of the line fault traveling wave signal; constructing a single fault pre-diagnosis model based on the time domain feature, the frequency domain feature, the time frequency feature and the semantic feature of the line fault traveling wave signal, and performing preliminary diagnosis on the category of the line fault of the test sample by using the fault pre-diagnosis model; and based on the D-S evidence theory, fusing each preliminary diagnosis result of the fault pre-diagnosis model, and constructing a fault diagnosis fusion model so as to carry out final diagnosis on the line fault type. According to the technical scheme of t